<template>
    <div>
               <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>

<!-- 卡片试图 -->
        <el-card>
            <!-- 提示区 -->
            <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
        <!-- </el-card> -->
        <!-- 进度条 -->
        <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
        </el-steps> 

        <!-- tab栏区域 -->
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
        <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave"
        @tab-click="tabClicked"
        >
            <el-tab-pane label="基本信息" name="0">
                <el-form-item label="商品名称" prop="goods_name">
                    <el-input v-model="addForm.goods_name"></el-input>
                </el-form-item>
                <el-form-item label="商品价格" prop="goods_price">
                    <el-input v-model="addForm.goods_price" type="number"></el-input>
                </el-form-item>
                <el-form-item label="商品数量" prop="goods_number">
                    <el-input v-model="addForm.goods_number" type="number"></el-input>
                </el-form-item>
                <el-form-item label="商品重量" prop="goods_weight">
                    <el-input v-model="addForm.goods_weight" type="number"></el-input>
                </el-form-item>
                <!-- 级联选择器 -->
                <el-form-item label="商品分类" prop="goods_cat">
                    <el-cascader expand-trigger="hover"
                    :options="catelist" :props="cateProps" v-model="addForm.goods_cat"
                    @change="handleChange">
                    </el-cascader>
                </el-form-item>
            </el-tab-pane>

            <el-tab-pane label="商品参数" name="1">
                <!-- 渲染表单的item项 -->
                <el-form-item :label="item.attr_name" v-for="item  in  manyTableData" :key="item.attr_id">
                   <!-- 多选框组 -->
                    <el-checkbox-group v-model="item.attr_vals">
                        <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals"
                        :key="i" border></el-checkbox>
                    </el-checkbox-group>
                </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品属性" name="2">
                <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                    <el-input v-model="item.attr_vals" :key="item.attr_id"></el-input>
                </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品图片" name="3">
                <!-- 
                action 表示图片要上传的后台API地址
                on-preview 指定预览事件
                list-type 当前预览组件的呈现方式
                 -->
                <el-upload
                    :action="uploadURL"
                    :on-preview="handlePreview"
                    :on-remove="handleRemove"
                    list-type="picture"
                    :headers="headerObj"
                    :on-success="handleSuccess"
                    >
                    <el-button size="small" type="primary">点击上传</el-button>
                    </el-upload>
            </el-tab-pane>
            <el-tab-pane label="商品内容" name="4">
                <!-- 富文本编辑器 -->
                <quill-editor
                    ref="myQuillEditor"
                    v-model="addForm.goods_introduce"
                    :options="editorOption"
                    @blur="onEditorBlur($event)"
                    @focus="onEditorFocus($event)"
                    @ready="onEditorReady($event)"
                />
                <!-- 添加商品 -->
                <el-button type="primary" class="AddBtn" @click="add">添加商品</el-button>
            </el-tab-pane>
        </el-tabs>
        </el-form>
    </el-card>
    
    <!-- 图片预览 -->
    <el-dialog
        title="图片预览"
        :visible.sync="previewVisible"
        width="50%"
        >
        <img :src="previewPath" class="previewImg">
    </el-dialog>

    </div>
</template>

<script>

import _ from 'lodash'

export default{
    data(){
        return{
            activeIndex: '0',
            //添加商品的表单数据对象
            addForm:{
                goods_name: '',
                goods_price: 0,
                goods_number: 0,
                goods_weight: 0,
                // 商品所属的分类数组
                goods_cat: [],
                //图片的数组
                pics: [],
                //商品详情
                goods_introduce: '',
                attrs: []

            },
            addFormRules:{
                goods_name:[
                    {
                        required: true,
                        message: '请输入商品名称',
                        trigger: 'blur'
                    }
                ],
                goods_price:[
                    {
                        required: true,
                        message: '请输入商品价格',
                        trigger: 'blur'
                    }
                ],
                goods_number:[
                    {
                        required: true,
                        message: '请输入商品数量',
                        trigger: 'blur'
                    }
                ],
                goods_weight:[
                    {
                        required: true,
                        message: '请输入商品重量',
                        trigger: 'blur'
                    }
                ],
                goods_cat:[
                    {
                        required: true,
                        message: '请选择商品分类',
                        trigger: 'blur'
                    }
                ]

            },
            // 商品分类泪飙
            catelist: '',
            cateProps:{
                label: 'cat_name',
                value: 'cat_id',
                children: 'children'
            },
            //动态参数列表数据
            manyTableData: [],
            //静态属性列表数据
            onlyTableData: [],
            //图片上传地址
            uploadURL: 'http://106.53.73.30:8888/api/private/v1/upload',
            //图片上传组件的headers请求头对象
            headerObj: {
                Authorization: window.sessionStorage.getItem('token')
            },
            previewPath: '',
            previewVisible : false
        }
    },
    created(){
        this.getCateList()
    },
    methods:{
        //获得所有商品的分类数据
        async getCateList(){
            const{data: res} = await this.$http.get(`categories`)
            if(res.meta.status !== 200){
                return this.$message.error('获取商品分类数据失败')
            }
            this.catelist = res.data
            console.log(this.catelist)
        },
        //级联选择器变化
        handleChange(){
            if(this.addForm.goods_cat.length !== 3){
                this.addForm.goods_cat = []
            }
        },
        // 即将离开的标签页的名字oldActiveName  新的标签的名字activeName
        beforeTabLeave(activeName,oldActiveName){
            if(oldActiveName === '0' && this.addForm.goods_cat.length !== 3){
                this.$message.error('请先选择商品分类')
                return false
            }
        },
        async tabClicked(){
            // console.log(this.activeIndex)
            //访问动态参数面板
            if(this.activeIndex === '1'){
                const{data : res} = await this.$http.get(`categories/${this.cateId}/attributes`,{
                    params: { sel : 'many' }
                })
                if(res.meta.status !== 200){
                    return this.$message.error('获取动态参数列表失败')
                }

                console.log(res.data)
                res.data.forEach(item =>{
                    item.attr_vals = 
                    item.attr_vals.length === 0 ? [] :
                    item.attr_vals.split(' ')
                })

                this.manyTableData = res.data
            }else if(this.activeIndex === '2'){
                const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes`,
                {
                    params: { sel : 'only'}
                })
                if(res.meta.status!==200){
                    return this.$message.error('获取静态属性失败')
                }
                this.onlyTableData = res.data
            }
        },
        // 处理图片预览效果
        handlePreview(file){
            //先获取
            console.log(file)
            this.previewPath = (window.URL) ? window.URL.createObjectURL(file.raw)
            : window.webkitURL.createObjectURL(file.raw)

            this.previewVisible = true
        },
        //处理移除图片的操作
        handleRemove(file){
            //得到移除图片的临时路径
            const  filePath = file.response.data.tmp_path
            //在数组中查询是否哟一这个图片  返回索引
            const i = this.addForm.pics.findIndex(x => 
            x.pic === filePath
            )
            //根据查询到的索引讲图片移除
            this.addForm.pics.splice(i,1)
        },
        //监听图片上传成功的事件
        handleSuccess(response){
            console.log(response)
            const picInfo = {
                pic: response.data.tmp_path
            }
            this.addForm.pics.push(picInfo)
            console.log(this.addForm)
        },
        //添加商品
        add(){
            this.$refs.addFormRef.validate
            (
                async valid => {
                    if(!valid){
                        return this.$message.error('请填写必要的表单项')
                    }
                    //执行添加的业务逻辑
                    // lodash  cloneDeep(obj)
                    const form = _.cloneDeep(this.addForm)
                    form.goods_cat = 
                    form.goods_cat.join(',')

                    //处理动态参数
                    this.manyTableData.forEach(item =>{
                        const newInfo = {
                            attr_id :item.attr_id,
                            attr_value: item.attr_vals.join(' ')
                            }
                        this.addForm.attrs.push(newInfo)
                        
                    })
                    //处理静态属性
                    this.onlyTableData.forEach(item =>{
                        const newInfo = {
                            attr_id : item.attr_id,
                            attr_value : item.attr_vals
                        }
                        this.addForm.attrs.push(newInfo)
                    })
                    form.attrs = this.addForm.attr_vals

                    //发起请求添加商品
                    const {data: res} = await this.$http.post(`goods`,form)
                    if(res.meta.status !== 201){
                        return this.$message.error('添加商品失败')
                    }
                    this.$message.success('添加商品成功')
                    this.$router.push('/goods')
                }
            )
        }
    },


    computed:{
        cateId(){
            if(this.addForm.goods_cat.length === 3){
                return this.addForm.goods_cat[2]
            }
            return null
        }
    }
}
</script>


<style scoped>
.el-checkbox{
    margin: 0 10px 0 0;
}
.previewImg{
    width: 100%;
}
.AddBtn{
    margin-top: 15px;
}
</style>
